```
public interface AttributeSupport
```
This interface collect engine's operations related to attributes. Those operations doesn't check for authorization therefore their usage should be limited by a wrapping code, the operations must not be exposed directly.

Author:

K. Benedyczak

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`pl.edu.icm.unity.types.basic.AttributeExt`	`getAttributeByMetadata(pl.edu.icm.unity.types.basic.EntityParam entity, String group, String metadataId)`	Returns attribute which has the given metadata set.
`Collection<pl.edu.icm.unity.types.basic.Attribute>`	`getAttributesByKeyword(String keyword)`	Returns all attributes linked with given keyword.
`Map<String,pl.edu.icm.unity.types.basic.AttributeType>`	`getAttributeTypesAsMap()`
`List<pl.edu.icm.unity.types.basic.AttributeType>`	`getAttributeTypeWithMetadata(String metadataId)`	Returns all attribute types which have the given metadata set.
`pl.edu.icm.unity.types.basic.AttributeType`	`getAttributeTypeWithSingeltonMetadata(String metadataId)`	Returns attribute type which has the given metadata set.
`Optional<String>`	`getAttributeValueByMetadata(pl.edu.icm.unity.types.basic.EntityParam entity, String group, String metadataId)`	Returns the first value of attribute which has the given metadata set.
`Map<Long,List<pl.edu.icm.unity.types.basic.Attribute>>`	`getEntitiesWithAttributes(String attributeTypeName)`	Search for all attributes with given type name.

Method Detail

getAttributeTypeWithSingeltonMetadata
```
pl.edu.icm.unity.types.basic.AttributeType getAttributeTypeWithSingeltonMetadata(String metadataId)
                                                                          throws pl.edu.icm.unity.exceptions.EngineException
```
Returns attribute type which has the given metadata set. The metadata must be singleton, otherwise unchecked exception is thrown. If there is no attribute type with this metadata, then null is returned.

Throws:

pl.edu.icm.unity.exceptions.EngineException

getAttributeTypeWithMetadata

List<pl.edu.icm.unity.types.basic.AttributeType> getAttributeTypeWithMetadata(String metadataId)
                                                                       throws pl.edu.icm.unity.exceptions.EngineException

Returns all attribute types which have the given metadata set.

Throws:: pl.edu.icm.unity.exceptions.EngineException

getAttributeByMetadata

pl.edu.icm.unity.types.basic.AttributeExt getAttributeByMetadata(pl.edu.icm.unity.types.basic.EntityParam entity,
                                                                 String group,
                                                                 String metadataId)
                                                          throws pl.edu.icm.unity.exceptions.EngineException

Returns attribute which has the given metadata set. If there is no attribute type with this metadata, then null is returned. The metadata must be singleton, otherwise unchecked exception is thrown.

Throws:: pl.edu.icm.unity.exceptions.EngineException

getAttributeValueByMetadata

Optional<String> getAttributeValueByMetadata(pl.edu.icm.unity.types.basic.EntityParam entity,
                                             String group,
                                             String metadataId)
                                      throws pl.edu.icm.unity.exceptions.EngineException

Returns the first value of attribute which has the given metadata set. If there is no such attribute type with this metadata or value, then null is returned. The metadata must be singleton, otherwise unchecked exception is thrown.

Throws:: pl.edu.icm.unity.exceptions.EngineException

getAttributeTypesAsMap

Map<String,pl.edu.icm.unity.types.basic.AttributeType> getAttributeTypesAsMap()
                                                                             throws pl.edu.icm.unity.exceptions.EngineException

Returns:: all attribute types as map. Not authorized anyhow
Throws:: pl.edu.icm.unity.exceptions.EngineException

getAttributesByKeyword

Collection<pl.edu.icm.unity.types.basic.Attribute> getAttributesByKeyword(String keyword)

Returns all attributes linked with given keyword. No authorization.

getEntitiesWithAttributes
```
Map<Long,List<pl.edu.icm.unity.types.basic.Attribute>> getEntitiesWithAttributes(String attributeTypeName)
```
Search for all attributes with given type name. Returns map identified by entity Id with list of attributes of given type. No authorization.

Interface AttributeSupport